Code Definition

B1429 — Lamp Seat Belt Circuit Short To Ground

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1429

B1429 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1429 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1429 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module (BCM) or Instrument Panel Cluster (IPC) controls the seat belt warning lamp using a low side driver that switches the lamp ground while the bulb or LED receives switched battery voltage from the lighting feed. DTC B1429 sets when the module detects an unintended short to ground on the lamp output, typically by reading the output pin pulled low even when the driver is commanded off. Common locations include chafed wiring contacting body sheet metal, water intrusion at instrument cluster connectors, and harness damage behind the dash. When this code is active the seat bel...

Join TaT to view the complete code information and diagnostic details.

Quick Facts